MESOSCALE DISCUSSION 0977
   NWS STORM PREDICTION CENTER NORMAN OK
   0816 PM CDT THU MAY 22 2008
   
   AREAS AFFECTED...NEB...KS...OK...TX
   
   CONCERNING...TORNADO WATCH 335...336...337...
   
   VALID 230116Z - 230145Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH
   335...336...337...CONTINUES.
   
   NEW WW WILL BE NEEDED GENERALLY ALONG AND E OF ONGOING STRONG TO
   SEVERE TSTMS CURRENTLY EXTENDING FROM SWRN NEB THROUGH WRN KS TO
   WEST CENTRAL OK.
   
   STRENGTHENING SLY LLJ FROM WRN/CENTRAL OK THROUGH KS TO SRN NEB WILL
   MAINTAIN INFLUX OF VERY MOIST/HIGH THETAE AIR MASS NWD ACROSS THE
   WARM SECTOR TO VICINITY OF WARM FRONT.  EARLY EVENING SURFACE
   ANALYSIS SHOWED A WARM FRONT EXTENDING SEWD FROM NERN CO THROUGH NRN
   KS TO CENTRAL MO...WITH A DRY LINE EXTENDING FROM FAR NERN CO SEWD
   INTO KS AND THEN SWD TO THE ERN TX PANHANDLE TO W CENTRAL TX.  STEEP
   LAPSE RATES ATOP THIS MOISTURE CORRIDOR WILL RESULT IN MODERATE
   INSTABILITY THROUGH THE EVENING.
   
   MID LEVEL WINDS WILL CONTINUE TO VEER TO SWLY FROM S-N DURING THE
   NEXT SEVERAL HOURS FROM OK THROUGH KS AS SHORT WAVE TROUGH...
   CURRENTLY EXTENDING FROM CO INTO WRN KS...LIFTS NWD.  THIS TREND IN
   VEERING MID LEVEL WINDS IS EVIDENT BETWEEN THE OUN 18Z TO 00Z
   SOUNDINGS...AND INDICATES THE LIKELIHOOD FOR ONGOING AND NEW TSTMS
   TO BE DISCRETE AND SPREAD EWD WITH TIME...AS INDICATED BY THE TSTM
   CLUSTER OVER WEST CENTRAL/NWRN OK.
   
   ..PETERS.. 05/23/2008
   
   
   ATTN...WFO...TSA...OAX...TOP...ICT...OUN...GID...LBF...DDC...GLD...AMA...BOU...
   
   37049604 35949588 35519697 35399820 35159919 34810004
   34810106 36490103 36990103 37730120 38370114 39370177
   40280211 40740203 41180259 41420198 41410020 41070015
   41089866 41039719 40099645